Armed with backpack and revolver I crawled through the brushwood until I reached the mountain. We had an agreement that wohoever met with the Moros first would fire once to inform the other. In Filadellia I was told this mountain reached a height of 500 or 600 metres but my altimeter registered not even a height of 100 metres above the plain. On the next slope between rocks of quartz I found two new species of Gymnocalycium. I was able to get the necessary data and to collect some fruit and published them as Gymn. stenopleurum and paediophilum. Fortunately we didn't meet any Moros on our journey. If only one of them got wind of us, we would have had the whole horde on our trail - leaving only flight and no more cactus research as an option.

Of Ritter's gatherings some seeds and one plant reached his sister Hildegard Winter in Frankfurt/Main. The seed was distributed by Mrs Winter as FR 1177. Bohomil Schütz released the first description in the Czech magazine Kaktusy in 1977 based on breedings by Ferdinand Plesnik. There occured a spelling error: paediophilum (paidion – child, philos – friend) became paediophylum. B. Schütz corrected the name in his monograph of the genus Gymnocalycium.

Ritter, in quite his own manner, commented this in volume 2 "Kakteen in Südamerika" (Cacti in South America):

This species was published by SCHÜTZ, who found himself unable to wait for my publication, in the magazine Kaktusy 1977, p. 1OO, under the distorting rendition of my name "as "GYMNOCALYCIUM PAEDIOPHYLUM : Schütz spec. nov." (paediophilum = fond of children, because of the many children this species has; phylon (greek, changed to latin phylum) in contrast meaning folk, nation).